Update Security String to 2016-05-01 in preparation for May 2016 Security OTA...
Update Security String to 2016-05-01 in preparation for May 2016 Security OTA am: 175b7800 am: 274e4837 am: 08d9bea4
am: 6bbd6844
* commit '6bbd6844':
Update Security String to 2016-05-01 in preparation for May 2016 Security OTA